Add parabolic fan speed calculation for a smooth speed change
Remove unused descreate fan speed control

The descrete fan speed control is replaced by a parabolic one. This was
done because parabolic fan speed control changes the speed smoothly.
While the descrete control changed the speed abruptly and the change in
fan noise drew too much attention. And that was annoying.
Change FAQ because of new parabolic speed control
Allow white spaces in config file
Change config file name to .fglrxFanSpeedControlConfig